I've been learning Mozilla/Firefox plgins. Click below to install:

• MeLCat Search Plugin
An interface to MeLCat, The Michigan eLibrary Catalog and Resource Sharing System.
• SANS ISC Port Search Plugin
• SANS ISC IP Search Plugin
• BFK Passive DNS Query Plugin
• VirusTotal Hash Query Plugin
• Norman Sandbox Query Plugin
• Anubis Sandbox Search by MD5 Plugin

More as I keep playing around ...